Yes, the northern fish trail has awesome swimming, the ground is all rocks so be careful of slipping. You can slide down them as well
You could swim in river.
Fish traps just be careful the rocks will get you it's better to just sit in the rapids
Park Staff do not recommend it. There are no designated swimming areas in the park and river levels vary daily. Most people try to go in the river at the Fish Traps. Some smaller creeks are nice to cool off in like Little Creek and Campbell Creek.
There are several good spots for cooling off and swimming.
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